i would recommend double checking the actual specs/ bench tests on that efest battery - i don't believe it is a 35 amp cdr battery and may not be as safe as you think...
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- Thread starter Anthony zucco
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I highly recommend you/your nephew spend some time with @Baditude & @Mooch (two of our resident battery/safety experts) and visit their blogs.
Here are links to some of Mooch's blogs:
* No matter what is printed on the battery wrapper: There are no 18650 batteries with a genuine rating over 30A!
* Links to all his battery tests to date: List of My Battery Tests | Mooch's Blog
* Picking a Safe Battery to Vape With: Table of 18650 Battery Safety Grades | Mooch's Blog
And here is Baditude's blog post on the Efest battery (20A CDR).
Purple Efest Batteries not as Advertised
* A cautionary blog that reveals that the purple Efest batteries may not have the specifications advertised. Also includes a commentary on "continuous discharge ratings" vs "pulse discharge ratings" of battery specs.
No its not...look, the batt doesn't get hot,
and in fact I have to chain vape it to get even warm...Its not overloaded, so please don't worry about me..thx!
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I haven't posted the results yet but testing shows that at 20A down to 3.2V the Efest has 15% less capacity than a 25R and runs 8°C hotter. At 25A it nearly hits my 100°C safety limit. This is absolutely not a 35A battery. It is an average 20A battery.
Don't cry when your nephew gets hurt due to you're incompetence.
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Ok.
Our recommendations are often based not on what the battery does during vaping, where it might not overheat, but what happens if things go wrong. If a mech mod's switch gets stuck on, breaks, or is accidentally pressed in a pocket then the battery has to survive that without venting. None of us think this kind of stuff will happen to us but that doesn't stop us from having health/life insurance, air bags, etc.
We just want you and your nephew to be safe. Think of all this as sort of battery insurance.
***shakes head in frustration at any non-newbie arguing with @Mooch over battery safety
***gives up, points back to OP's question
if you've tried a .25 and a .5 so far, I'd say shoot for something in between with the 24g you've got, that's doable. Play on steamengine for build specs because it depends on the diameter of what tool you use to wrap around...but over here, I run most of my rda's around 0.38-0.45 and build with either 24g or 26g, whichever falls in my hand first. (Which really means I prefer the 26, but have more of the 24 at the moment. Whoops. Lol) anywho for me it comes to 5 wraps each on a dual setup when I build with the 24g. But plz go to steam engine vs taking that as gospel, because I'm also using a mini screwdriver that I have no idea the diameter of, I spent hours playing with an ohm meter to get a feel for it, because it's easier to hold in my hand than a drill bit. I'm weird I know. Rofl hope it gives you an idea
PS vtc4 is a GREAT battery, well done, just remember the tradeoff is you lose battery runtime to gain continuous discharge safety... in other words, when you can, you may want to grab a few extras and a lil plastic case to carry with ya so your vape doesn't die when you're gone from your house
***gives up, points back to OP's question
if you've tried a .25 and a .5 so far, I'd say shoot for something in between
with the 24g you've got, that's doable. Play on steamengine for build specs because it depends on the diameter of what tool you use to wrap around...but over here, I run most of my rda's around 0.38-0.45 and build with either 24g or 26g, whichever falls in my hand first. (Which really means I prefer the 26, but have more of the 24 at the moment. Whoops. Lol) anywho for me it comes to 5 wraps each on a dual setup when I build with the 24g. But plz go to steam engine vs taking that as gospel, because I'm also using a mini screwdriver that I have no idea the diameter of, I spent hours playing with an ohm meter to get a feel for it, because it's easier to hold in my hand than a drill bit. I'm weird I know. Rofl hope it gives you an idea PS vtc4 is a GREAT battery, well done, just remember the tradeoff is you lose battery runtime to gain continuous discharge safety... in other words, when you can, you may want to grab a few extras and a lil plastic case to carry with ya so your vape doesn't die when you're gone from your house
Notice you said "7 wraps"... The OP only had a couple of wraps.... With that few of wraps a person might as well just use a straight wire and forget all about coiling it lol .... A person needs to find a happy medium in order to vape safely but yet perform good and have a fairly decent ramp up time. You want to have enough turns of a coil so that you can provide enough surface area for efficient vaporization while at the same time keeping the battery load to a SAFE value but you don't want so many turns that the resistance gets too high and gives a lousy ramp up time.
Don't worry about it. Lots of fault finders on this forum like you who post things that is no help at all...like this post..
I've been building mechs for over 3yrs now..Always obey ohms law and NEVER even come close to a battery venting...
I'm not stupid... Except for maybe posting in this forum..[emoji107]
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My 2 yr old XXIX mod shown here with the Doge. Same 24g build at .15 ohms but using the 40A yellow AWT batt..been using these batts for over 2 mos and they're great. .
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Here's an analogy, just for kicks.
Numerous homeowners are killed or severely injured every year while standing on a ladder and using a chainsaw. Yes, many get away without injury, but it's a huge risk factor that they're not even aware of.
Professional arborists don't die from this practice because they simply don't do it. The risk is unacceptable to them because they fully understand that risk.
Folks here are made aware and warned every day about the risks of overtaxing a vaping battery. Yet many consider the practice just fine because they've managed to get away with it for a while. These folks clearly don't fully understand the risk.
Vaping doesn't need any more negative headline news stories
Numerous homeowners are killed or severely injured every year while standing on a ladder and using a chainsaw. Yes, many get away without injury, but it's a huge risk factor that they're not even aware of.
Professional arborists don't die from this practice because they simply don't do it. The risk is unacceptable to them because they fully understand that risk.
Folks here are made aware and warned every day about the risks of overtaxing a vaping battery. Yet many consider the practice just fine because they've managed to get away with it for a while. These folks clearly don't fully understand the risk.
Vaping doesn't need any more negative headline news stories
No need to get irked for sure. I am assuming that nobody on this thread is trying to find faults although it may come off like that. I know I am certainly not. I can't speak for the others but I care about people and don't want to see a grenade go off in their face or hands. You need to understand basic electric circuits very well in order to minimize possible hazards, and even then things can be overlooked and accidents can happen. I have been in electronics all of my adult life and I still do stupid things and overlook things from time to time. It's just like @philoshop said and you can be very good at winding coils and such but if you overlook one tiny thing you can get yourself into trouble. I am sure you have heard of venting nor did I once think you are stupid...... Nobody knows everything otherwise we could call our self God. The advice that myself and others have given in this thread is 100% accurate. You cannot change facts. The folks here are just trying to look out for others. At least I know I am.
No one here is saying that someone can't take the risk. We just want to make sure that people understand what that risk is.
Remember the old saying, "You can lead a horse to water, but you can't force him to drink it..."?
If you want to believe that AWT battery is actually 40 amps continuous discharge rate, then be my guest. Those of us who actually research and study the batteries available to us know better.
I find it amusing that an upstart battery brand like AWT has been able to come up with a real 40 amp battery, while the battery industry leaders such as LG, Panasonic, Samsung, and Sony have not. 40 amps is all marketing hype and not to be believed.
It's well known that Efest has over-rated their battery specs for years, especially the purple ones. That so-called 35 amp purple Efest has been bench tested to be only 20 amps continuous. Purple Efest Batteries, Not As Advertised
Wise vapers pay no attention to marketing "pulse" ratings. Pulse ratings are unreliable at best, because every vendor/manufacturer has their own definition of what a pulse rating is. The industry standard is the "continuous" discharge rating, which allows consumers to shop & compare more intelligently between brands of batteries.
Everyone is free to set their own safety parameters, and I can only say what mine are.
I try to never exceed 50% of the CDR (continuous discharge rating) of a fully charged battery (4.2v). So with actual 20A batteries, that would be 10A. An Ohm's Law Calculator tells me that a .4 ohm build is as low as I would want to use.
The reason that I place a 50% limit is because as a battery ages the mAh of the battery degrades, as the mAh degrades so does the batteries c rating (amp limit). So down the road, your 20A battery may only be a 10A battery.
I provide this information soley to promote battery and vaping safety. I don't want to see anyone get hurt by vaping. Only fools say, "Well, I've been doing this for a long time and nothing bad has happened."
If you want to believe that AWT battery is actually 40 amps continuous discharge rate, then be my guest. Those of us who actually research and study the batteries available to us know better.
I find it amusing that an upstart battery brand like AWT has been able to come up with a real 40 amp battery, while the battery industry leaders such as LG, Panasonic, Samsung, and Sony have not. 40 amps is all marketing hype and not to be believed.
It's well known that Efest has over-rated their battery specs for years, especially the purple ones. That so-called 35 amp purple Efest has been bench tested to be only 20 amps continuous. Purple Efest Batteries, Not As Advertised
Wise vapers pay no attention to marketing "pulse" ratings. Pulse ratings are unreliable at best, because every vendor/manufacturer has their own definition of what a pulse rating is. The industry standard is the "continuous" discharge rating, which allows consumers to shop & compare more intelligently between brands of batteries.
Everyone is free to set their own safety parameters, and I can only say what mine are.
I try to never exceed 50% of the CDR (continuous discharge rating) of a fully charged battery (4.2v). So with actual 20A batteries, that would be 10A. An Ohm's Law Calculator tells me that a .4 ohm build is as low as I would want to use.
The reason that I place a 50% limit is because as a battery ages the mAh of the battery degrades, as the mAh degrades so does the batteries c rating (amp limit). So down the road, your 20A battery may only be a 10A battery.
I provide this information soley to promote battery and vaping safety. I don't want to see anyone get hurt by vaping. Only fools say, "Well, I've been doing this for a long time and nothing bad has happened."
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i guess what spooks me a bit centers around 2 things -
first, I see a lot of young people jumping face first into mech mods with no/ minimal understanding of battery safety/ Ohm's law because they want to be cool and blow clouds (Hey... Clouds is in town... but I digress...) - in some cases, they are fortunate enough to have someone around in the real world to give them some guidance/ pointers on these things - in other cases, they have folks from a shop who are not interested in their safety (or protecting vaping as a whole by not creating/ fostering situations that adversely affect all of is, either directly or indirectly)... I am all for free will, individual rights, and informed decision making along with the consequences thereof - but key word, for me, here, is INFORMED decision making...
second, there seem to be a lot of battery wraps with misleading information on them - and a picture of the battery wrap with its misleading information is not really a substitute, in my opinion, for checking the facts - bench tests, user reviews, etc - and this seems to become a point of contention in a number of situations - truly, the only fault I would find here, is battery manufacturers/ retailers labeling their products in a fashion that creates potential liability situations... an end user can understand Ohm's law and have a decent working grasp of battery safety, and still be put in an untenable situation based on misleading info on a battery - it's important that WE as a group understand that these batteries are not made nor specifically marketed for vaping - so it's kind of up to us to exercise some due diligence in regards to what we are using - we are fortunate enough to have folks like @Mooch who are willing to do (and a bit fascinated by... lol) battery testing, to get some real world results/ data that supercedes the simple fallacious labeling of the fabled 40A (35A) 18650 battery... ultimately, we are, as individuals, responsible for the consequences of our actions and decisions - but it really sucks sometimes because no one (save sociopaths) really wants to see ANYONE get hurt - and, often those consequences travel beyond the sphere of simple personal responsibility and affect numerous others inadvertently and indirectly (sometimes, when the turd hits the water, the splash zone is much larger than anticipated...)
TLDR?
too many folks starting with mechs based on bad advice, no research and overwhelming desire to blow clouds spooks me...
lots of battery labels might as well be printed on toilet paper - they're kaka...
hate to see anyone get hurt - and sometimes those consequences are more far reaching indirectly than just personal injury...
not fault finding - just attempting to pay forward what was freely given to me
vape on - and vape safe (granted, some chicks dig dudes with only two fingers per hand, but I am not ready to be that dude)
first, I see a lot of young people jumping face first into mech mods with no/ minimal understanding of battery safety/ Ohm's law because they want to be cool and blow clouds (Hey... Clouds is in town... but I digress...) - in some cases, they are fortunate enough to have someone around in the real world to give them some guidance/ pointers on these things - in other cases, they have folks from a shop who are not interested in their safety (or protecting vaping as a whole by not creating/ fostering situations that adversely affect all of is, either directly or indirectly)... I am all for free will, individual rights, and informed decision making along with the consequences thereof - but key word, for me, here, is INFORMED decision making...
second, there seem to be a lot of battery wraps with misleading information on them - and a picture of the battery wrap with its misleading information is not really a substitute, in my opinion, for checking the facts - bench tests, user reviews, etc - and this seems to become a point of contention in a number of situations - truly, the only fault I would find here, is battery manufacturers/ retailers labeling their products in a fashion that creates potential liability situations... an end user can understand Ohm's law and have a decent working grasp of battery safety, and still be put in an untenable situation based on misleading info on a battery - it's important that WE as a group understand that these batteries are not made nor specifically marketed for vaping - so it's kind of up to us to exercise some due diligence in regards to what we are using - we are fortunate enough to have folks like @Mooch who are willing to do (and a bit fascinated by... lol) battery testing, to get some real world results/ data that supercedes the simple fallacious labeling of the fabled 40A (35A) 18650 battery... ultimately, we are, as individuals, responsible for the consequences of our actions and decisions - but it really sucks sometimes because no one (save sociopaths) really wants to see ANYONE get hurt - and, often those consequences travel beyond the sphere of simple personal responsibility and affect numerous others inadvertently and indirectly (sometimes, when the turd hits the water, the splash zone is much larger than anticipated...)
TLDR?
too many folks starting with mechs based on bad advice, no research and overwhelming desire to blow clouds spooks me...
lots of battery labels might as well be printed on toilet paper - they're kaka...
hate to see anyone get hurt - and sometimes those consequences are more far reaching indirectly than just personal injury...
not fault finding - just attempting to pay forward what was freely given to me
vape on - and vape safe (granted, some chicks dig dudes with only two fingers per hand, but I am not ready to be that dude)
First of all I'm 62 yrs old and definitely not a kid into blowing huge clouds, especially on a mech..
Was a 2 pack a day smoker for over 25 yrs when I quit smoking and started vaping 3 1/2 yrs ago now..I have 2 yrs in basic electronics and fully understand ohms law and battery safety..
That said I use common sense picking the right batt for my build to be safe..
True I can only go by what the rating is stated on the wrapper but my build only pulls 21A at 4v...a claimed 4OA batt is twice what I need but if it's actually 25A
then there is still a little room to spare.
Bottom line is how it acts in my mod under a load...they hold a charge all day long, my button and mod don't get hot and I have to do some heavy chain vaping for it to even get warm, and thats from the RDA getting hot, not the batt..
Common sense goes a long way our vaping hobby... I too want to always vape safe...and have been doing so for the past several yrs...just sayin
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...if you choose to disagree, that's your right & your choice. I just want to point out that the new members forum isn't quite the best place to recommend pushing batteries' limits. Also, a battery tester sharing info about tested limits being different than marketing hype isn't hating on you or bring rude, it's sharing info because of caring. (Many tests by many ppl have confirmed what his tests show on true cdr, BTW)
post was not directed at you, brother - was really intended as an observation based on trends I seem to be seeing - I understand that you are an adult and not new to either vaping or mechs - and the electronics background is definitely a plus
vape on
Thanks man, you post made me feel a little better about ECF..
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